Unlike my experience with the Son of Frankenstein custom build, I really want to make sure that these lights are in the exact right spot before I continue with their housing, which will be blocks of stones on each corner and a center stone to match. Of course, they'll be hollow and will house the LEDs. I need to figure out how to make it so that once I get the lights in the right spot, I can then lock them down. I want to be able to in the future easily change a LED if something goes wrong.
Since I'll be using four of these lights, I'll only need about 33 ohm resistance. I have a 100 ohm resistor that I'll probably go ahead and use, unless I go to Radio Shack tomorrow and pick up something closer.